Doorlock



March 2 1926. 1,575,516

W. AHERN DOORLOCK Filed July 6, 1922 Patented Mar. 2, 1926 WILLIAM AHEBN, OF SYDNEY MINES, NOVA SCOTIA, CANADA. i

DOORLOCK.

Application filed July 6, 1922. Serial No. 573,225.

To all whom it may concern:

Be it known that 1, WILLIAM Arman, a citi- Zen of the United States, residing in Sydney Mines, in the Province of Nova Scotia Canada, have invented a new and useful Doorlock.

The primary object of my invention is to provide a door lock of the latch type that can be operated in an expeditious manner, it being unnecessary to turn the knob for operating the lock with the result that time is saved in opening a door to which the improvement is associated. V

A further object is to provide a lock simple in construction and operation, cheap to manufacture yet durable and capable of long wear.

This invention also consists in certain other features of construction and in the ence will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which: I

Figure 1 is a horizontal sectional view taken through the lock casing to show' a plan of the interior.

Figure 2 is an elevation of the strike plate adapted for this type of lock.

Figure 3 is an edge elevation thereof.

Figure 4: is a side elevation of the lock casing with the cover removed and showing the normal position of the parts in full lines and the operative position thereof in broken lines.

Figure 5 is a vertical sectional view taken through the casing.

Referring to the drawings in detail the letter A indicates the lock casing which is provided with the usual cover plate B and end plate C while D indicates the strike plate. Mounted for slidable movement through the casing A and the cover plate B adjacent the upper end thereof is a collar 1 formed with a square in cross section bore to receive the knob spindle (not shown), and rising from the upper surface of the collar is a projection 1' arranged so as to contact with a horizontally arranged lever 2 pivoted for movement between a pair of ears .2 as clearly shown in Figure 4 of the drawings.

Pivoted adjacent its upper end to lie in the pathlof the pivoted lever 2 is an elongated lever?) having its lower end passing through a slot 3 formed in the catch shank 4, the slot 3' having its end walls arranged parallel and at an inward inclination, whereby' movement of the elongated lever when swung on its pivot will cause the catch to be moved to its innermost position. A coil spring 5 has one end lined within the easing and its opposite end secured to the elongated lever 3 midway its ends and tends to retain the elongated lever in normal posi tion as shown by full lines in Figure 4.

A locking lever 6 is provided with a slot in its upper end to receive a stud 6 and by this connection it will be apparent that they lever is capable of a sliding pivotal movement. The lower end ofthe locking lever 6 is formed in hook like formation and is associated with a screw 7 and when the looking lever engages the screw 7 it is in operative position and prevents the movement of the collar. The locking lever 6 is adapted to be moved through the instrumentality of a key (not shown) and which is adapted to engage the lower hooked end for moving the same to either a locked or unlocked position. v

The operation of the lock is extremely pimple and may be briefly described .as fol ows:

To operate the lock as above described, the knobs (not shown) thereof are moved in a direction in which the door swings to open position, either a push or pull thereon is required. This movement causes them]- lar 1 to operate the horizontally pivoted lever 2 through the medium of the projection 1' on the collar and in turn the lever 2'swings the elongated lever 3 on its pivot which draws in the catch and releases the door as will be readily apparent. If the lock is correctly positioned within the door only a slight movement of the knobs is required to operate the lock. To look the door the locking lever 6 is pushed up with the key above referred to from the position indicated by broken lines in Figure 4: to that in full lines, the upper end of the locking lever engaging the collar 1 to prevent move ment thereof. The screw 7 not only performs the above mentioned function of receiving the locking lever in its operative position but is adapted with the screw 8 to holdthe cover plate 13 to the casing ind .It is thought from the foregoing description that the advantages and novel features of my invention will be readily apparent.

I desire it to bennderstood that I may make changes in the construction and in the combination and arrangement of the several parts, provided that such changes :tall Within the scope of the appended claim.

, lVhat I claim is:

A lock of the characterdescribed comprising a casing, alatch-ing catch therefor, a horizontally sliding collar in the casing adapted to rece've a knob spindle, a pro jection rising from thehorizonta'lly sliding collar, a lever mounted in juxtaposition to the sliding collarnndbeing adapted to be rocked by the projection, an elongated lever pivoted adjacent one end and lying in the path of the lever first mentioned for movement tl1erehy,said elongated lever passing through a slot formed in the h tching catch, and a coilsprmg tending to hold said elongated lever innormal position.

lVILLIAh l AHERNI 

